/*
 * Copyright 2012-2025 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.assertj.core.internal;

import org.assertj.core.api.comparisonstrategy.ComparisonStrategy;
import org.assertj.core.api.comparisonstrategy.StandardComparisonStrategy;

import static java.lang.Math.abs;

/**
 * Reusable assertions for <code>{@link Double}</code>s.
 *
 * @author Drummond Dawson
 * @author Alex Ruiz
 * @author Joel Costigliola
 */
public class Doubles extends RealNumbers<Double> {

  private static final Doubles INSTANCE = new Doubles();

  /**
   * Returns the singleton instance of this class based on {@link StandardComparisonStrategy}.
   *
   * @return the singleton instance of this class based on {@link StandardComparisonStrategy}.
   */
  public static Doubles instance() {
    return INSTANCE;
  }

  // TODO reduce the visibility of the fields annotated with @VisibleForTesting
  Doubles() {
    super();
  }

  public Doubles(ComparisonStrategy comparisonStrategy) {
    super(comparisonStrategy);
  }

  @Override
  protected Double zero() {
    return 0.0d;
  }

  @Override
  protected Double one() {
    return 1.0d;
  }

  @Override
  protected Double NaN() {
    return Double.NaN;
  }

  @Override
  protected Double absDiff(Double actual, Double other) {
    return isNanOrInfinite(actual) || isNanOrInfinite(other)
        ? abs(actual - other)
        : abs(absBigDecimalDiff(actual, other).doubleValue());
  }

  @Override
  protected boolean isFinite(Double value) {
    return Double.isFinite(value);
  }

  @Override
  protected boolean isNotFinite(Double value) {
    return !Double.isFinite(value);
  }

  @Override
  protected boolean isInfinite(Double value) {
    return Double.isInfinite(value);
  }

  @Override
  protected boolean isNotInfinite(Double value) {
    return !Double.isInfinite(value);
  }

  @Override
  protected boolean isNaN(Double value) {
    return Double.isNaN(value);
  }
}
